Restructurings and Lease Terminations (Schedule of Accrual and Usage of Restructuring Charges) (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
Dec. 31, 2011	Dec. 31, 2008	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Restructuring Reserve [Roll Forward]
Beginning balance			$ 3,904	$ 307	$ 821
Restructuring charge			406	4,886	0
Cash payments			(3,669)	(1,289)	(514)
Ending balance	3,904		641	3,904	307
Current portion of accrued restructuring	3,430		275	3,430
Long-term portion of accrued restructuring			366
Leases [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			593	0	149
Restructuring charge	700	500	33	651	0
Cash payments			(109)	(58)	(149)
Ending balance	593		517	593	0
Current portion of accrued restructuring			151
Long-term portion of accrued restructuring			366
Severance [Member]
Restructuring Reserve [Roll Forward]
Beginning balance			3,311	307	672
Restructuring charge			373	4,235	0
Cash payments			(3,560)	(1,231)	(365)
Ending balance	3,311		124	3,311	307
Current portion of accrued restructuring			124
Long-term portion of accrued restructuring			$ 0

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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